Magnetism of uranium compounds probed by XMCD spectroscopy
Magnetism of uranium compounds probed by XMCD spectroscopy
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DOI：
10.1088/1361-6463/aacf7d
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发表时间：
2018-07
期刊：
影响因子：
--
通讯作者：
Fabrice Wilhelm;J. Sanchez;A. Rogalev
中科院分区：
文献类型：
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作者：
Fabrice Wilhelm;J. Sanchez;A. Rogalev
在过去的25年里，X射线吸收近边结构(XANES)和X射线磁性圆二色谱(XMCD)被证明特别适合于研究铀化合物的电子和磁性。使用磁光和规则可以解开自旋和轨道对吸收原子携带的总磁矩的贡献，并确定它们的大小和符号。XMCD还提供了元素选择性磁化的可能性。在这篇综述中，XANES/XMCD通过选择铀化合物的例子来说明XANES/XMCD的优点，例如分子磁体、强关联电子系统(顺磁、铁磁超导体、超磁和反铁磁体)和在ESRF束线ID12上研究的铀基多层膜。文中还对最近的实验进展提出了一些看法。
Over the last 25 years, x-ray absorption near edge structure (XANES) and x-ray magnetic circular dichroism (XMCD) have proven to be particularly suitable for the study of the electronic and magnetic properties of uranium compounds. The use of magneto-optical sum rules can provide the possibility of disentangling the spin and orbital contribution to the total magnetic moment carried by the absorbing atom, and to determine both their magnitudes and their signs. XMCD also offers the possibility of element selective magnetization. In this review, the strengths of XANES/XMCD are illustrated by selected examples of uranium compounds, such as molecular magnets, strongly correlated electron systems (paramagnet, ferromagnetic superconductor, metamagnet and antiferromagnet) and uranium-based multilayers investigated at the ESRF beamline ID12. Some perspectives, initiated by recent experimental developments, are also given.